Valve of pumps for moving gaseous bodies



(No Model.) y

l W. l?. GARRISON. VALVE FOR PUMPS EUR MOVING GASB'OUS BoDEs.

Patented June 23, 1891.

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' UNITED STATES4 PATENT OEEIcE.

IVILLIAM F. GARRISON, OF BROOKLYN, NEV YORK.

VALVE OF PUMPS FOR MOVING`GASEOUS BODIES.

SPECIFICATION forming part of Letters Patent No. 454,646, dated June 2S,1891.

Application filed July 13, 1889.

.To @ZZ whom, it may concern:

Be it known that I, WILLIAM F. GARRIsoN, of the city of Brooklyn, in thecounty of Kin gs and State of New York, have invented a new anddischarge of the aeriform or gaseous iiuid or body, and also for thesealing of the valves of such pumps by means of the products ofcondensation which occur in such fluids or bodies.

, nally parallelwith the valve-seat and containing openingscorresponding` with the ports provided in the valve-seat for theinduction and eduction of the iiuid to and from the ends of thecylinder.

My invention consists in the novel combinations hereinafter describedand claimed, in which said valve and plate are elements, and in certainother details hereinafter described and claimed.

Figure lis a horizontal longitudinal sectional view of a part of thecylinder and piston and of the entire valve system of a pumpillustrating my invention. Fig. 2 represents a transverse verticalsection taken in about the dotted line a: shown on Fig. l.

Similar letters of reference designate corresponding parts in both theiigures.

A designates the cylinder, having a valveseat a on one side parallelwith its length.

A is the piston, which is valveless.

Bis the slide-valve.

The valve-seat a has three ports b c c', arranged like the ports forwhat is known as the short D-valve, the port b being in this case theinlet-port and having an inlet-pipe Z1 connected with it, and the portsc c' communicating through proper passages one with one end of thecylinder and the other with the other end of the cylinder, both servingSerial No. 317,402. (No model.)

for the induction of fluid thereinto and its @duction therefrom.

The valve B consists of a i'lat plate having its face and its backparallel longitudinally, as shown in Fig. l, and having in its' face acentral cove d, and having provided in it two passages e e', whichextend right through it and which are so spaced relatively to the coveand to the ports in the valve-seat that one of the said passages c e andone of the ports c c' may be in communication with each other while theother of said ports is in communication with the cove d and through itwith the outlet-port b.

O is a plate tted to the back of the valve and supported upon thecylinder in such manner that its face presented toward the valveseat ais parallel with the said seat and at such distance therefrom that thevalve will work between the said face and the valveseat freely, butgas-tight; In the example represented the said plate O is supported uponthe seat by four columns f at its corners, and is represented asconfined to these columns by means of spiral springs g, applied tostud-bolts 72', which are screwed into the seat. The said stud-bolts hmay form part of the said c'olumns, or the said columns may be hollowand the stud-bolts may .pass through them. The springs are representedas confined at their outer ends by means of collars t' set over theupper ends of the bolts and confined by pins j passing through the saidbolts. The plate, C has provided through it openings 7c 746', the mouthsof which terminate in the inner face of the said plate next the valve,and are so spaced that they are exactly opposite the ports c c in thevalve-seat, so that when the passages c c', respectively, are brought bythe movement of the valve opposite the ports c c in the valve-seat therewill be communication through said passages from the ports c c to theopenings 7c 7e. The openings 7c 7o are continued through the plate tothe outside thereof and communicate with valve- IOO In the examplerepresented (see Fig. 2) there are two such openings for each. Therewill be generally a separate valve for each port.

The valve B is provided with a stem B', to which motion may be givenfrom the prime mover off the pump in any suitable manner, which it isnot necessary for me here to describe, because slide-valves for theinduction and eduction to and Jfrom the cylinders of pumps are commonlyso operated. This motion is such that in the movementin one directionthe induction of the fluid admitted Y' through the pipe to theinlet-port b takes place through the cove d and port c to one end of thecylinder, while the eduction from the other end of the cylinder takesplace from the port c', passage e', opening 7c', and the valve m', andduring the movement of the piston in the other direction the inductiontakes place through b, b, d, and c', and the eduction throughv c, c, 7c,and the valve m. The valves m m are opened by the pressure produced onthe eduction side of the pist-on by the movement of the latter andclosed again by the springs on the return movement of the piston.

Besides the cove d in the valve-face and the passages e e through it,there are two other passages o o provided through the valve, one on eachside of the cove between it andthe passage e or c. These passages 0 0"terminate in vthe face of the valve with ports so spaced that they willwhen the valve is in its central position, which it occupies at the endsof the stroke of the piston in either direction, communicate with theports c c', as shown in Fig. 1. The said passages terminate in the backof the valve in ports which are very nea-r together, and which when thevalve is in its central position are both op* posite a little cove pprovided in the inner face of the plate C. By means of these passages 0o and cove p communication is made between the ports c c', and throughthem between opposite ends of the cylinder, as shown in Fig. 1, when thepiston is at either end of its stroke, and by that means the pressure isequalized on both sides of the piston.

On the back or outside of the plate C is a chest D, which covers all theopenings 7c k and the valvesm m', and at one side of which there is anoutlet q, through which the discharge of the pump takes place. Thischest is represented as made integral with the plate C and as iittedwith a removable cover D', by which access may be had to the valves.

In order to provide for the moistening or lubrication of the valves m mby the products of condensation from the gaseous iiuids or bodies whichare moved by the pump and thereby keeping them sealed when closed, Ihave represented as applied near the said valves outside thereofdeflectors for the purpose of obstructing the gaseous fluids dischargedthrough said valves in such manner as to intercept the said products ofcondensation.

These deliectors are shown in bothv figures of the drawings; but theirform is best shown in Fig. 2. They are represented as consisting ofboxes r, which may be of light sheet metal closed at the bottom and onall sides, but open at the top, as shown at r in Fig. l, and havingtheir upper edges turned downward to form a sort of hood 4'2 within thebox. Below this hood r2 and within the box r is a slanting plate s, thelower edge of which is very near the valve-seat and the upper edge ofwhich is within or under the hood r2. The gaseous Vfluids escaping whenthe valves are open are caused to strike against the interior ot' thebox r and against the lower surface of the deliecting-plate s and havefor thc most part to escape between the upper edge of the plate s andthe interior of the hood r2, within which they have to descend beforeescaping into the upper portion of the chest D or to their final outlet.The gases striking the lower surface of the deflectingplate s and theinterior ot the hood have the products of condensation which takes placedeposited upon the under surface ot the plate s and also thrown downfrom the hood r2 upon the upper surface of the deflecting-plate s, andthese products run down said plate onto the valve-seat, which they keepalways lubricated or moistened, so that they seal the valve when closed.Theremay be a defiector or deflectors, such as I have above described,provided for each valve, or one deflector or set of deflectors may beconstructed to operate in connection with several valves arranged neareach other.

I have hereinbefore spoken of the plate C as a fixed plate. It might bepositively fixed in any suitable manner at a proper distance from thevalve-seat a, so that the valve would work between it and the seatgas-tight and almost free from the pressure of the fluid being pumpedand from friction; but I prefer, instead of using rigid and unyieldingfixtures for holding the said plate in place, to use the springs g, asherein described, which are suf.- ficiently positive in their action andhold the plate in proper fixed position, while'fhey provide for the easyremoval of the said plate to obtain access to the valve when necessary,and also for the lifting of the said plate by the pressure of thefluids, if that should become necessary in the operation of the pump`owing to the disorganization ot any of its parts.

I have represented the space between the plate C and the valve-seat asentirely open at the sides, except where the columns f are placed; butthis space may be inclosed by a Wall or curtain attached to the saidplate and fitting closely to or around the valve-seat, it' suchinclosure should be desirable in case of the gaseous fluids moved by thepump being ot' such deleterious or offensive nature that their escape byany leakage of the valve would be objectionable.

'What I claim as my invention, and desire to secure by Letters Patent,is#

IOO

IIC

l, The combination of a pump-cylinder having a valve-seat in which areports communicating with each end of the cylinder for induction andeduction and an interposed inlet-port, a slide-valve having two passagesthrough it and a cove in its face interposed between said passages, thesaid passages and cove being so spaced that one of said passages and oneof said ports for induction and eduction may be in communication witheach other while the other of said ports is in communication with thecove and through it with the inlet-port, a plate iitted to the back ofsaid valve and having openings through it corresponding with the saidports for induction and eduction, tixed supports for said plate tomaintain it ata proper distance from and parallel with the valve-seat, achest on the back of said plate covering said openings and provided withanbutlet, and outwardlyopening clack-valves iitted to said openings,substantially as and for the purpose herein set forth.

2. The combination, with a pumpcylinder having a valve-seat containingports communicating with each end of the cylinder for induction andeduction and an interposedinlet-port,of a slide-valve having twopassages through it and a cove in its face, spaced as herein described,and a stationary plate tted to the back of said valve and having in itopenings corresponding with the said ports for induction and eduction,the saidvalve also having two smaller passages through it, and the. saidplate having in it a cove through which and said smaller passagescommunication is made between the two induction and educton ports andthrough them between the ends of the cylinder when the valve is in its.substantially as and for the purpose herein describeda WILLIAM F.GARRISON.

Witnesses FREDK. HAYNEs, L. MEGBERT.

